© Hach Company, 2007, 2014. All rights reserved. Printed in Germany.
Edition 2 March 2014
For technical assistance or ordering information: visit
www.hach.com
, call 800-227-4224 or email [email protected]
Quick Start Guide
For si792 D series 2-wire transmitters
DOC016.53.00797
Additional copies are available on www.hach.com
DANGER: Explosion Hazard. This Quick Start Guide is intended for setup of the si792
transmitter in a non-hazardous location. It is not a substitute for reading and following
the instructions in the user manual. Installation in a hazardous location must be
performed by qualified personnel per the applicable control drawing or ATEX certificate
in the si792 D on the provided documentation CD.
DANGER: Electric Shock Hazard. Disconnect power to all wiring before making
connection to the si792 D series transmitters.
1.
Connect the power and communication (
Table 1
).
2.
Connect the sensor wires (
Table 2
and
Table 3
).
3.
The transmitter is set by default for Oxysens and Oxyferm. Manually select the sensor type for the
Oxygold G (
si792(x) D only
. Refer to the user manual for si792x D-FF and si792x D-PA.)
a.
Press
CONF
,
ENTER
.
b
Input passcode:
1200
. Press
ENTER
. The display will show “out.1MNU”. Press
ENTER
.
c
The display will show “tyPE A” and “o1 SnSR”. Use the
ARROW
keys to select “tyPE A” (Oxy-
ferm and Oxysens) or “tyPE B” (Oxygold). Press
ENTER
.
d
Press
CONF
,
ENTER
to exit the configuration mode. The transmitter will remain in hold mode
for 20 seconds, then return to measurement mode.
4.
Calibrate the sensor. The two most common calibration methods are described below. Refer to
the user manual for other details.
Calibration in air (recommended)
a.
Press
CAL
, enter passcode:
1100, ENTER
. The display will briefly show CAL and then the
entered (or default) humidity value.
b
Remove the sensor from the process and place in air.
c
Enter the actual relative humidity and press
ENTER
. The display will show the entered (or
default) barometric pressure.
d
Enter the barometric pressure and press
ENTER
. A drift check will begin. The drift check may
take some time. When complete, the display will show the concentration in the units specified
in the configuration menu.
Note:
To exit the drift check after more than 10 seconds, press
CAL
(accuracy will be reduced).
e
Accept the calculated value for the concentration or adjust the value as necessary and then
press
ENTER
. The display will show the new slope and zero (relative to 25 °C and
1.013 mbar).
f
Press
ENTER
to end the calibration. Return the sensor to the process. The measured value
will be shown in the display alternately with Hold.
g
Press
ENTER
to return to the measure mode.
Calibration by Comparison
The sensor can be calibrated for DO (or gas volume concentration) by entering the sample
value from a measurement in an instrument such as a laboratory or portable meter. The sensor
does not need to be removed from the process during calibration. The sample temperature
should correspond to the measured process temperature for accurate results.
a.
Press
CAL
, enter passcode:
1105
,
ENTER
. The display will briefly show CAL PRD and then
StorE.
b
Collect a grab sample for measurement in the lab. Press
ENTER
to store the sample value in
the transmitter.
c
The cal mode indicator will flash to indicate that calibration is not complete. The transmitter
will continue to measure and display the current sample values.
d
Measure the grab sample with a laboratory or portable meter.
e
Press
CAL
, enter passcode:
1105
,
ENTER
to access the product calibration once more. The
display will briefly show CAL PRD and then CALC.
f
Edit the displayed value to match the value measured by the laboratory or portable meter and
press
ENTER
. The new slope and zero point will be shown.
g
Press
ENTER
to end the calibration. Return the sensor to the process. The measured value
will be shown in the display alternately with Hold.
h
Press
ENTER
to return to the measure mode.
Note:
For comparison calibration via Foundation Fieldbus, see the user manual.
Table 1 Terminal assignments
Terminal No.
4–20 mA/HART
Profibus PA
Foundation Fieldbus
10
(+)
(–)
(–)
11
(–)
(+)
(+)
Table 2 Terminal assignments—si792(x) D (4–20 mA/HART)
Terminal No.
Oxygold G/Oxyferm sensor wire color
1
Oxysens sensor wire color
1
clear
clear
5
shield/red
brown
6
shield/yellow-green
shield
7
green
yellow
8
white
blue
1
With VP cable LZY079, LZY353 and LZY354
Table 3 Terminal assignments—si792x D-FF and si792x D-PA
Terminal No.
Oxygold G/Oxyferm sensor wire color
1
1
With VP cable LZY079, LZY353 and LZY354
Oxysens sensor wire color
2
clear
clear
4
shield/red
brown
5
shield/yellow-green
shield
7
green
yellow
8
white
blue
