Hach sc1000 User Manual

In the TEST/MAINT menu, every output current can be set to certain values for testing 
reasons. If necessary, each output can be adjusted as well. Additionally, the current state 
of the outputs can be requested. 

The output current can be set to certain values and then be adjusted with an offset and a 
factor. 

To set these two parameters:

1. Set the SET OFFSET value to “0” and the SET FACTOR value to “1”.

2. Set the output current (CURRENT OUT) to “4 mA” and then only adjust the SET 

OFFSET value until the output current is really 4 mA. 

3. Set the output current (CURRENT OUT) value to “20 mA”, then adjust the factor until 

the output current is really 20 mA and cross-check the 4 mA. 

4. Repeat the steps 1-3 until the output precision reaches a desired value.

FUNCTION TEST

OUTPUT 1-4

CURRENT OUT

Select an output current and set at the appropriate output.

SET FACTOR

Default value: 1
Adjusts the output current with an factor changed with this value.

SET OFFSET

Default value: 0
Adjusts the output current with an offset changed with this value.

ALL

Default: 0 mA
Sets OUTPUT 1-4 to 0, 4, 10, 12 or 20 mA.

SET OUTMODE

Default value: HOLD
Decides how other members react if they try to read an output current value while the output 
current card is in the function test. As the value of the output current in the function test is not 
based on any calculations, other members reading this value probably have to be informed 
about this special situation. 

HOLD

Another reading member does not use the current read value, but uses the last value before the 
output current card was in the function test mode.

ACTIVE

Another reading member uses the current value even when the output current card is in the 
function test mode.

SET TRANSFER

The reading member uses an own substitute value for its own output value.

STATUS OUTPUT

Indicates the status for each output current channel and probe which is read from the output 
current card. 

SENSOR OK

The according output channel is working fine and the current output card is able to read the data 
from the probe to set the output current.

SENSOR MISSING

The according output current channel cannot get data from the probe because the probe is not 
responding anymore. In this case the output current has the value set in SYSTEM SETUP>SET 
TRANSFER or holds the according current value read the last time the probe was responding.

SENSOR FAIL

The output current card communicates with the according probe, but this probe has got an 
internal failure and cannot provide reliable data. In this case the output current has the value set 
in the menu SET TRANSFER in SYSTEM SETUP or holds the according current value read the 
last time the probe was responding.