Hach SIGMA 900, Руководство пользователя

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Section 5
Page 43
8837prg.fm
Manual Mode
5.9 Manual Mode
5.9.1 Manually Operating the Sample Pump
1. To manually operate the pump, place the sampler in standby state. The
sampler is in standby state when the display reads
READY TO START
,
PROGRAM HALTED
, or
PROGRAM COMPLETE
.
2. To operate the pump, press either the
PUMP
or
PURGE
key. This will
cause
MANUAL MODE - PUMP/PURGE/CLEAR
to appear on the display.
Pressing the
PUMP
key causes the pump to run in the forward (sample)
direction as long as the key is held. Pressing the
PURGE
key causes the
pump to run in the reverse (purge) direction.
3. To run the pump continuously in either direction without having to hold
down the
PUMP
or
PURGE
keys, press the
*
key. This will cause
LOCK-PUMP/PURGE
to appear on the display. Then press either the
PUMP
or
PURGE
key.
4. To stop the pump, press the
STOP PUMP
key or turn the sampler off with
the
OFF
key. Pressing
STOP PUMP
returns the display to
PUMP/PURGE/CLEAR
.
5. To exit the manual mode, press the
CLEAR ENTRY
key. This returns the
sampler to the standby state.
6. While the sampler is in standby, a sample cycle can be initiated by
pressing the
TAKE SAMPLE
key.
5.9.2 Manually Operating the Distributor Arm
When the sampler is in Multiple Bottle mode and on Standby mode, manually
advance the sample distributor arm to the next bottle by pressing
BOTTLE
ADVANCE
.
5.10 Measurements Triggered by Liquid Levels or Flow
The sampler can operate in any one of three control modes, using an external
controlling device (i.e. Liquid Level Actuator, Cat. No. 943, or an external flow
meter). In any of the three modes, the sampler remains in a standby state until
liquid at the sample source reaches a predetermined level. This feature may
be also used to access the setup of the storm water monitoring program, First
Flush. The three modes are described below:
Mode 1
The instrument collects a sample within the first minute that the liquid rises to
the predetermined level. After the first sample is taken, the sample interval
automatically resets to the programmed interval.
If the liquid falls below the predetermined level, the sampler continues
to collect samples at the programmed time or flow interval, until the
program ends.
Mode 2
The instrument collects a sample within the first minute that liquid rises to the
predetermined level. After the first sample is taken, the sample interval
automatically resets to the programmed interval. The sample program ends if
liquid falls below the predetermined level. If the liquid again rises to the