Siemens ULTRAMAT 23 Product Information page 14

Sequence parameters
The zero gas purge time is twice the AUTOCAL purge time. The sample gas purge time is equal to the AUTOCAL purge
time. The AUTOCAL purge time is an adjustable parameter; its setting is described in the operating instructions, C79000-
G52xx-C216, section 5.8.4.
The protection function can be enabled and disabled with the menu command 'Protection Probe H2S' (see illustration
above). The function is ON with the factory setting.
An active protection function can be interrupted as follows:
● Set the protection function to OFF in the operator menu
● Set the protection function to OFF via ELAN
● Start another device state such as Calibration (e.g. AUTOCAL), Warm-up
● Acknowledge fault 3 in the log (menu command sequence: Diagnostics -> Analyzer status -> Logbook/Faults)
The device remains in measuring mode while the protection function is running.
The following illustration show how the protection function runs over time:
Concentration
MW > Limit
1 * ASZ
110 % MBE
ASZ = Autocal purge time (for H
MBE = full-scale value
MW = measured value
NG = zero gas
Figure 4 The H S protection function over time
2
14
Test time
NG purging
1 * ASZ
2 * ASZ
S usually: 5 min)
2
Following 6 cycles
Test time
NG purging
1 * ASZ
2 * ASZ
Supplement 1 for Operating Instructions C79000-G52xx-C216-03
Function test
Zero gas valve open
Zero gas valve closed
A5E02769382-03, 03/2012
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