Commissioning; Replacement Of Batteries; Operation; Start - Grundfos DIT-L Bedienungsanleitung

5. Commissioning

5.1 Replacement of batteries

Although the screws are dismantled, the battery
compartment cover provides resistance against
Caution opening due to the special sealing.
For opening don't use tools, which can cause
damage to the device!
Battery compartment cover
Fig. 2 Replacement of batteries (back)
To ensure that the photometer is waterproof, the seal
ring must be in position and the battery compartment
cover must be fixed with the four screws.
If the batteries are removed for more than one
Caution
minute, the date and time menu will start
automatically when the photometer is switched on
again. See section
(24-hour format).
EC guideline 2006/66/EC requires users to return all
used and worn-out batteries and accumulators. They
Note
must not be disposed of together with ordinary
domestic waste.

6. Operation

White display texts are place holders for selected
Note
method names or displayed results.

6.1 Start

Switch on the unit using the [On/Off] key.
On/Off
METHOD
"METHOD" appears in the display.
Select the required test method using the
Mode
[Mode] key.
To avoid unnecessary scrolling for the required
test method, the photometer has a Scroll
Memory (SM) function memorising the latest
method used before being switched off.
When the photometer is switched on again, the
scroll list comes up with the last used test
method first.
6
Seal ring
6.8.3 Setting date and time

6.2 Zero setting

appears in the display.
METHOD
Fill a clean vial with the water sample up to the
10 ml mark, screw the cap on and place the vial
correctly in the sample chamber. See fig. 3.
Press the [Zero/Test] key. See also
Zero/Test
section 6.4 OTZ (One Time
The method symbol flashes for
METHOD
approx. 8 seconds.
0.0.0 "0.0.0" appears in the display.

6.3 Test

After completing zero setting, remove the vial
from the sample chamber. The characteristic
coloration appears after the addition of the
reagents.
Replace the cap on the vial and place it correctly
in the sample chamber. See fig. 3.
Press the [Zero/Test] key. See also
Zero/Test
section 6.7 Countdown/reaction
The method symbol flashes for
METHOD
approx. 3 seconds.
The result appears in the display.
The result is saved automatically.
Repeating the test:
Zero/Test
Press the [Zero/Test] key again.

6.4 OTZ (One Time Zero)

The zero setting is held in memory until the
photometer is switched off. It is not necessary to
perform a new zero setting every time, if the
water samples under test are from the same
body of water and the conditions of testing are
the same. The zero setting can be repeated at
any time, if necessary.
Repeating the zero setting:
Zero/Test
Press the [Zero/Test] key for 2 seconds.

6.5 Display backlight

To turn the display backlight on or off, press the
!
[!] key. The backlight is switched off
automatically during the measurement.

6.6 Recall of stored data

If the photometer is switched on, to access the
!
recall menu, press the [!] key for more than
4 seconds.

6.7 Countdown/reaction period

If a reaction period is included in a method (total
chlorine, ozone), a countdown function can be
used:
!
Press the [!] key and hold it.
Press the [Zero/Test] key.
Zero/Test
Release the [!] key; the countdown starts.
After the countdown is finished, the
measurement will start automatically.
It is possible to interrupt the countdown by
pressing the [Zero/Test] key. Measurement will
start immediately.
An incomplete reaction period can lead to incorrect
Caution
test results!
Zero).
period.