Hach-Lange 2100 AN Laboratory Turbidimeter User Manual - Manual (Page 42)

Table 5 RS232 command set (continued)
Command Description
RMN Gets the recorder minimum value.
To change the recorder minimum value, enter RMN=XXXXX
(XXXXX=a number, minimum value=0), then push Enter.
RMX Gets the recorder maximum value.
To change the recorder maximum value, enter RMX=XXXXX
(XXXXX=a number, maximum value=10,000), then push Enter.
RTN Gets the recorder trim minimum value.
To change the recorder minimum value, enter RTN=XXXXX
(XXXXX=a number, minimum value=200), then push Enter.
RTX Gets the recorder trim maximum value.
To change the recorder maximum value, enter RTX=XXXX
(XXXX=a number, maximum value=4800), then push Enter.
SAV Gets the signal average buffer size.
To change the signal average buffer size, enter SAV=XX (XX=a
number, maximum value=15, default=10), then push Enter.
Connect to a data recorder
Note: Use a twisted-pair, shielded recorder cable. Use of non-shielded recorder
cable may result in radio wave emission levels greater than is allowed under the
compliance regulations listed.
Note: Connect the shield of the recorder cable to the recording device chassis
ground terminal to decrease the effects of unwanted interferences.
Connect a ¼–inch recorder phone plug to the recorder output jack on the
back of the instrument. Refer to
Figure 2 on page 8. For the best
performance, use a twisted-pair, shielded recorder cable that is no more
than 1.8 m (6 ft) in length with a load impedance greater than 10 kohms.
Configure the data recorder output
Note: The recorder minimum and maximum values are selected independently for
each measurement mode. When the measurement mode changes, the previous
settings are automatically used.
1. Push SETUP. The SETUP light turns on.
2. Use the arrow keys to select an option:
Option Description
14 Sets the minimum value of the recorder output for the current
measurements units.
15 Sets the the maximum value of the recorder output for the current
measurement units.
16 Moves the recorder minimum output to calibrate the recorder.
17 Moves the recorder full-scale output to calibrate the recorder.
18 Sets the recorder to zero scale.
19 Sets the recorder to half scale.
20 Sets the recorder to full scale.
3. Push ENTER.
4. If option 14 or 15 was selected, move the decimal point to the correct
location using the right arrow key, then push ENTER.
5. Use the arrow keys to change the value.
6. Push ENTER.
7. Push SETUP.
Advanced operation
Calibrate the turbidimeter with formazin standards
The instrument may be calibrated using prepared formazin standards
made from 4000-NTU formazin stock solution. Refer to
Accessories
on page 54.
Note: Use recently prepared formazin standards to get the accuracy specifications
for turbidity in
Specifications on page 5.
40 English