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Calibrate Menu for pH
Display
(Factory settings shown)
Set:
Temperature
Set:
Standard
Set:
Slope
Loop Range: pH
0.00 → 14.00
Output Source:
pH
Output Mode:
Low
Output Setpnt:
4.00 pH
Output Hys:
0.50 pH
Output Range:
pH
4.00 → 8.00
Output PlsRate:
120 Pulses/min
Last CAL:
06-30-01
page 6 of 12
Provides a maximum 25ºC offset to match temperature measurement to external reference.
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Applies a linear offset to the pH measurement. The ideal value is the average pH of your
application. (A sample of your application at process temperature is recommended.)
>
Applies a slope to the pH measurement. The slope value and the standard value must be at
least 2 pH units apart.
>
The ideal values are the minimum and maximum values of your process.
Select the minimum and maximum values for the 4-20 mA Current loop output.
>
Select pH or Temperature as the source for the Open Collector Output.
>
Select the mode of operation for the Open Collector output: High, Low or proportional Pulse.
The signal may be disabled if not in use.
>
In Low or High Mode, the Open Collector output will be activated when the pH reaches this
value.
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In Low or High mode, the Open Collector output will be deactivated at Setpoint ± Hysteresis,
depending on High or Low Setpoint selection. (See details on page 4.)
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If the output is in PULSE mode, set the start and end point of the range and also set the
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maximum pulse rate. (The maximum PULSE rate setting is 400 pulses per minute.)
The combined Output Range and Pulse rate settings shown here indicate:
"Start pulsing when the pH value is 4 and increase the pulse rate up to the maximum of 120
pulses per minute when the pH value reaches 8"
>
Use this "note pad" to record important dates, such as annual recertification or scheduled
maintenance.
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Description
‡ SIGNET 8750-1 pH/ORP Transmitter
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