GF SIGNET 8860 Dual Channel ConductivityResistivityTDS Controller

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GF SIGNET 8860 Dual ChannelConductivity/Resisti
vity/TDS Controller
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Two versions for simple stocking
Power requirements 3-8860-AC 100 to 240 VAC
10 , 50-60 Hz, 20VA or 10 to 26 VDC 10,
regulated, 0.5 A max 3-8860 10 to 26 VDC
10, regulated, 0.5 A max only.
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Accuracy 2 of reading(over a three decade
range I.e. 0 to 1,000)
Utilizing a sinusoidal drive (as opposed to
squarewave drive) much greater range and accuracy
is possible. The 8860s patented (US pat. no.
5,708,363) measuring circuitry provides for a 3
decade range of operation with /-2 of read
accuracy. We accomplish this with plain metal
electrodes (316 SS, Titanium or Monel)and avoid
platinization of the electrodes to extend range
(a costly and maintenance intensive process).
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Multiple Functions
Relay FunctionsLow or High Alarmwith
Hysteresis and Time DelayorProportional
PulseofCond.,Temp, or FunctionorUSP
Limitswith margin below setpointand hysteresis
4-20 FunctionsFully spannable and
reversiblewith adjustable endpoints.of Cond.,
Temp,or Function4 to 20 mA and Relay outputs
have front panel display and simulation
capability!
Unit Functions Single or Dual Sensor InputThree
isolated 4 to 20 mA outputs 2 SPDT
RelaysPlus 2 additional SPDT Relays or Solid
State Control outputs (switch selectable)
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Temperature Compensation Methods

• Standard Compensation Set 2/Deg. CMost
  applicable setting due to the natural occurrence
  of salts in water and linear addition of salt to
  conductance.
• Programmable from 0 to 10/degree CSalts
  typically 2/ deg. C
• Enter None for NO Temperature CompensationNecessa
  ry for USP and applications where automatic TC is
  not desired such as water used for its insulative
  or conductive properties.

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Menus View
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Menus Calibrate 1. Measurement setup
Chan 1 Cell Standard Custom gt Chan 1
Cell 0.01 0.1 1.0 10 20 gt Chan 1
Set Temperature gt Chan 1 Set
Conductivity gt Chan 1 Units
gt Repeats for Channel 2
Allows selection of Standard or Custom Cell
values (No limits placed in custom
mode. Standard cell values are labeled 0.01
0.1 1.0 10
20 Allows calibration of probe temperature.
PT-1000 (error limited to /- 20 deg. C) Allows
calibration to a known value. All zero entry
reverts both conductivity and temp to factory
calibrated state. Allows display in uS, mS,
Kohm, Mohm, PPM (TDS) or PPB (TDS)
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Menus Calibrate 2. Function selection
Function Ratio C1C2 Ratio C2C1 Diff
C1-C2 Diff C2-C1 Reject C1-gt C2 Reject C2-gt
C1 Only one function setting may be used.
Ratio C1C2 C1/C2 Useful for determining Ratio
of Cell 1 to Cell 2 Ratio C2C1 C2/C1 The
inverse of above, used when sensors are wired or
located in reverse order. Difference value
C1-C2 The absolute difference in Unit of
measure. Difference value C2-C1 Used when
sensors are wired or located in reverse
order. Percent Rejection 100(1-CH2/CH1)
Displays filtration efficiency CH1 Feed/CH2
Product Percent Rejection 100
(1-CH1/CH2) Displays filtration efficiency CH2
Feed/CH1 ProductUsed when sensors are wired or
located in reverse order.
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Menus Calibrate 3. Loop setup
Loop 1 Source Chan 1 Cond
gt Loop 1 Rng uS 0.0000 -gt 2000.0
gt 4 mA --gt 20 mA Repeats for Loop 2 and 3
Allows selection of current loop source Choices
are Chan 1 Conductivity Chan 2
Conductivity Chan 1 Temp Chan 2 Temp FUNCTION
(Set in previous menu) Sets current loop range
To reverse span (20 to 4) reverse left and
right numbers
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Menus Calibrate 4. Relay/Open Collector setup
Relay 1 Mode High gt Relay
1 Source Chan 1 Cond gt Relay 1
Setpoint 1500.00 uS gt Relay 1
Hysterisis 50.00 uS gt Relay 1 Delay
020.00 secs gt
Allows operating Mode selection of relay or open
collector output Off, Low, High, USP, or
Pulse Low Active when process lower than
setpoint High Active when process above
setpoint USP Graduated setpoint based on USP
allowances Pulse Proportional pulse output
from 0 to 400 pulses/minute Source selection
Chan1,2 Cond, Chan 1,2 Temp or Function Relay
Setpoint (USP is high alarm with fixed limits
with a percentage setpoint. A setting of 10
allows a ten percent variation from the
limit) Relay Hysterisis or deadband (Delay
allowed in Low, High, and USP modes from 0.0 to
6400 secs (1.777 Hrs.). Menus repeat for Relay 2
Relay/Open Collector 3 Relay/Open Collector
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Menus USP Defined
USP (United States Pharmacopeia) requirements now
allow for on-line conductivity measure of the
water instead of offline tests for water quality.
The limits are preloaded and control a high alarm
when in USP mode, We are one of a few to offer
this feature! Water
Temperature Limit uS 0-5 deg
C 0.6 uS 5-10 deg C 0.8 uS 10-15
deg.C 0.9 uS 15-20 deg C 1.0 uS 20-25 deg
C 1.1 uS 25-30 deg C 1.3 uS 30-35 deg
C 1.4 uS 35-40 deg C 1.5 uS 40-45 deg
C 1.7 uS 45-50 deg C 1.8 uS 50-55 deg
C 1.9 uS 55-60 deg C 2.1 uS 60-65 deg
C 2.2 uS 65-70 deg C 2.4 uS 70-75 deg
C 2.5 uS 75-80 deg C 2.7 uS 80-85 deg
C 2.7 uS 85-90 deg C 2.7 uS 90-95 deg
C 2.9 uS 100-105 deg. C 3.1 uS
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New Relay Function for USP

• USP relay function allows for an indication of
  unacceptable water quality across the full range
  of allowable conductance and temperature.
• This is a high alarm, conductance greater than
  limits are not allowed.
• A single percentage setpoint is allowed, 0 to
  100. (Percentage BELOW the allowable limit)
• A programmable hysteresis in uS (0 to any value)
  prevents relay chatter.

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Menus Options 1. Display
Contrast 3 gt Temp
Display oC gt Channel
2 On gt Power
60 Hz gt
Controls the display contrast from 1 to 5. 1 is
the lightest, 5 is the darkest Allows display
in degrees Celsius or Fahrenheit. Once calibrate
in C or F it may be switched without need for
re-calibration. Allows Channel two to be turned
off, reducing the number of menu items if the
second channel is unused Selects an internal
filter to reduce effects of AC line noise.
Select between 50 and 60 Hz according to the AC
power standard in your area of use
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Menus Options 2. Input Settings
Allows selection of temperature compensation
Mode None No affect on conductivity reading due
to temperatureLinear Linear correction due to
temp i.e. 2 per degree C. Pure Water Corrects
for non-linear pure water characteristics.
Allows entry of the proper TC slope term,
typically 2 per degree C for natural
water Allows averaging/response of the incoming
signal Off 1.5 secs., Low 4.5 secs , High
9 secs.Any change gt 25 1.5 secs., Sets
display decimal from none to four places.
Channel 1 settings control Function decimal
allowance for Ratio and Difference
Chan 1 TC Mode Pure Water gt Chan
1 TC Slope 2.00 gt
Averaging High gt Chan 1
Decimal . gt
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Menus Options 3. Loop/Relay Options
Loop 1 Adjust 4.00 mA gt
Loop 1 Adjust 20.00 mA gt repeats for
Loop 2,3 Relay 3 Active Low
gt repeats for Relay 4 Test Loop 1
4.00 mA gt repeats for Loop 2,3 Test
Relay 1 On gt repeats for
Relays 2,3,4
Allows 4 mA endpoint adjustment 3.8 to 5.00
mA Allows 20 mA endpoint adjustment 19 to 21
mA Sets output Logic for Relay 3, Relay 4
(Open Collector 3, Open Collector 4) Allows
Loop output control for testing or
simulation. Range is from 3.60 to 21.00 mA and
scrolls up or down by pressing up or down arrow
buttons. Allows Relay control for testing or
simulation. Relay toggles On or Off when up or
down keys are pressed.