Hanna Instruments mV 600 Series - Manual (Page 14)

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CALIBRATION
The controller is factory calibrated for mV and temperature
inputs as well as for the analog outputs.
The user should periodically calibrate the instrument. For great-
est accuracy, it is recommended that the instrument is calibrated
frequently.
It is possible to standardize the electrode with only one buffer,
preferably close to the expected sample value (one-point cali-
bration), but it is always good practice to calibrate in at least
2 points.
pH CALIBRATION (for pH 500 Series only)
The pH controller can be calibrated through a one-point,
two-point or three-point calibration. You do not need to en-
ter the method chosen, simply exit the
calibration mode, by pressing CAL,
when the desired number of points has
been calibrated.
The calibration points for pH 500 are pH 4.01, pH 7.01 and
pH 10.01 (at 25°C). The sequence proposed by the control-
ler is pH 7.01, pH 4.01, pH 10.01. However, the user can
change this sequence by means of the and keys.
The electrode must be kept hydrated at all times and defi-
nitely prior to calibration. The temperature probe should also
be connected to the process meter. The meters are equipped
with a stability indicator. The user is also guided with indica-
tions on the display during the calibration procedure.
Initial Preparation
Pour small quantities of pH 7.01
(HI 7007) and pH 4.01 (HI 7004)
and/or pH 10.01 (HI 7010) solutions
into individual beakers. If possible, use
plastic beakers to minimize any EMC
interference.
HI 7007
HI 7004
HI 7004
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Windows ® and Windows Terminal ® are registered Trademark of “Microsoft Co.”
Note Cables other than HI 920010 may use a different configu-
ration. In these cases, no communication between the meter
and the PC is possible. If you are not using the HI 920010
cable, contact the nearest HANNA Customer Service Center
or proceed as follows for a proper electrical connection:
pH 500/mV 600 PC
9-pin DSUB male connector 9-pin DSUB female connector
Pin 2 Pin 3 (Txd)
Pin 3 Pin 2 (Rxd)
Pin 4 Pin 6 (Txd)
Pin 5 Pin 5 (Gnd)
Pin 6 Pin 4 (DTR)
Pin 7 short circuit with 8
(RTS+CTS)
pH 500/mV 600 PC
9-pin DSUB male connector 25-pin DSUB female connector
Pin 2 Pin 2 (Txd)
Pin 3 Pin 3 (Rxd)
Pin 4 Pin 6 (Txd)
Pin 5 Pin 7 (Gnd)
Pin 6 Pin 20 (DTR)
Pin 4 short circuit with 5
(RTS+CTS)
SETTING THE BAUD RATE
The transmission speed (baud rate) of the meter and the
external device must be identical.
The meter is factory set to 4800. If you wish to change this
value, use item 71 in the setup mode (see page 14).