Oakton 35622 Series User manual

OPERATING INSTRUCTIONS
OAKTON®35622-series
Printer
Printed in the U.S.A. 9/97
ON
DISTRIBUTED BY:
9. Warranty
Oakton Instruments warrants this product to be free from significant deviations in
material and workmanship for a period of one year from the date of purchase. If
repair is necessary and has not been the result of abuse or misuse within the warran-
ty period, please return by freight pre-paid and amendment will be made without
charge. The Customer Service Department. will determine if the product problem is
due to deviations or customer abuse. Out-of-warranty products will be repaired on a
charge basis.
10. Return of Goods
Authorization must be obtained from our Customer Service Department before
returning items for any reason. When applying for authorization, please include
data regarding the reason the items are to be returned. For your protection, items
must be carefully packed to prevent damage in shipment and insured against possi-
ble damage or loss. We will not be responsible for damage resulting from careless or
insufficient packing. A restocking charge will be made on all unauthorized returns.
NOTE: We reserve the right to make improvements in design, construction, and
appearance of products without notice.

2 3
Table of Contents
1. Introduction ........................................................................................................3
2.. Features and Functions..................................................................................4-5
2.1 Interface..............................................................................................................................4
2.2 Power sources....................................................................................................................4
2.3 Connection cables (connecting printer to your instrument)......................................5
2.4 Printer head and paper....................................................................................................5
2.5 LED Indicators ..................................................................................................................5
3. Preparing to print............................................................................................6-9
3.1 Loading the ribbon cassette ........................................................................................6-7
3.2 Loading the paper ............................................................................................................8
3.3 Power supply ....................................................................................................................9
3.4 How to charge rechargeable battery pack ....................................................................9
4. Setting up printer parameters ..................................................................10-11
4.1 Selecting Meter Type (benchtop or hand-held; pH or Conductivity)
and Communication Parameters ( baud rate, parity, stop bit) ..........................10-11
5. Printing data ................................................................................................12-13
5.1 Printing data....................................................................................................................12
5.2 Printing OAKTON pH benchtop meter calibration parameters........................12-13
5.3 How to perform the printer self test............................................................................13
6. Specifications ....................................................................................................14
7. Troubleshooting................................................................................................15
8. Accessories ........................................................................................................15
9. Warranty..............................................................................................................16
10. Return of Items................................................................................................16
1. Introduction
Thank you for purchasing an OAKTON 35622-series printer. The OAKTON
35622-series printer is a dot-matrix, impact, micro-printer with built-in internal
rechargeable batteries. It prints on standard adding machine type rolls of paper.
This printer features a standard RS-232 serial interface. It supports various baud
rates, data bits, and parity, which you can select with simple singular key strokes.
This printer’s communication port is a D-Shape 25-pin female connector.
NOTE: A NEW 35622-SERIES PRINTER NEEDS TO BE CHARGED FOR AT
LEAST 2 HOURS BEFORE USE.
Lower case
ON
On/off switch
Removable
cover plate
Paper
out slot
POWER
LED
SELECT
button
SELECT
LED FEED
button
DC power connector 25-pin female connector
Side of unit
Back of unit

5
4
2. Features and Functions
Interface
This printer supports standard RS-232 serial interface only. The baud rate is selec-
table for 1200, 2400, 4800 or 9600 baud. The data bits can be set at 8 or 7 bits with 1
or 2 stop bits, with None, Even or Odd parity.
The printer’s factory default settings are 9600 baud, 8 data bits with one stop bit and
even parity. This matches the default setting on the OAKTON products and should
not need to be changed. To change baud rate, data bits and parity, please see details
in Section 4.1 on page 10.
Located in the back of the unit is a D-shape 25 pin female connector for direct con-
necting to instruments with an RS-232 cable. For connecting cable information,
please see section 2.3 on page 5.
Power Sources
You can power this printer with
either a 7.5 VDC external source for
continuous power, or with its inter-
nal rechargeable batteries for com-
plete portability.
This printer includes a 110 V or
220 V AC/DC adapter that supplies
7.5 VDC. We recommend that you
only use this adapter with this print-
er. For power adapter specifications,
see page 14.
This printer’s internal battery pack
consists of 6 AA size rechargeable
batteries. The battery pack charges while the printer is turned off and the AC/DC
adapter is connected to the printer. It takes approximately 12 hours to fully charge
the batteries. Once the battery pack is fully charged, it can print continuously for
1 to 2 hours.
CAUTION: If you use a different AC/DC adapter, please pay special attention to the
output voltage (7.5 V) and current (750 mA) limits and its polarity. If the
voltage and current are either too low or too high, or the polarity is
reversed, the printer may not work normally. This in turn may lead to
printer head and/or battery pack damage that is irreversible.
Connection Cables (connecting printer to your instrument)
Use RS-232 serial communica-
tion cable 35622-59 to connect
this printer to your OAKTON
instrument. You can order this
cable from your OAKTON sup-
plier. If you wish to make your
own cable, please refer to the
pin-assignment details of the
printer in the Specifications sec-
tion on page 14.
Printer head and paper
This unit is a dot-matrix, impact printer that uses a standard EPSON printer head
and black ribbon. It uses a small, 2.25" width plain paper roll (adding machine type)
stored in the internal paper compartment.
The printing speed is 16 characters per second; it can print 24 characters per line.
The ribbon’s life expectancy is 10,000 lines. The ribbon and paper are available
directly from your OAKTON supplier or at local office supply stores.
LED Indicators
There are two LED indicators on the front of the printer, indicating power and select.
P: Power. Indicates the power is on when the LED is red.
SEL: Select. Indicates the printer is on line and ready for printing when the
LED is green.
2.1
2.3
2.4
2.5
2.2
DC power connector 25-pin female connector
AC adapter

3. Preparing to print
The printer ribbon, paper roll, and rechargeable battery pack are loaded in the print-
er before packing. When the printing becomes faint, see section 3.1 on how to load a
new ribbon into the printer. When the paper runs out, see section 3.2 on how to load
paper into the printer. Both the ribbon and the paper are available in local office sup-
ply stores or from your OAKTON distributor.
Loading the Ribbon Cassette
A ribbon cassette has been put inside the printer before packing. When the printing
becomes faint after long use, put in a new ribbon as follows:
1. Lift the removable cover plate (Figure 3.1.1).
2. Hold the left end of the ribbon cassette with your left hand. Hold the right
end in right hand with your right thumb on top and your forefinger below.
3. Lift the right end of the cassette with the right forefinger. Then lift the left end.
The ribbon cassette will come off easily (Figure 3.1.2).
CAUTION: Do not lift the left end first. This may damage the ribbon and
printer head.
4. Take a new ribbon cassette. Hold the cassette as shown in step 2. Insert the left
end over the gear axle on the left end of the printer head while holding the right
end of the cassette up. The left end should slide in easily. (Figure 3.1.3). If it does
not, raise the left end of the ribbon cassette again, and slightly rotate the gear on
the left end of the cassette clockwise (in the direction of the arrow). (Figure 3.1.4)
5. Secure the cassette on the printer head. Then press down the right end of the
cassette. Make sure the paper slides in between the ribbon and the metal paper
guide (Figure 3.1.5).
6. Close the removable cover plate. Slide the paper through the paper out slot on the
top of the cover plate.
NOTE: If the ribbon is loose, refer to the Troubleshooting section on page 15.
3.1
Figure 3.1.1 Lift the cover plate
Figure 3.1.2 Unloading the old ribbon cassette (lift right end first)
Figure 3.14. If left end does not slide on easily,
turn the gear as indicated by the arrow
Figure 3.1.3 Loading the new ribbon cassette (place left end first)
6 7
metal
paper guide ribbon paper
Figure 3.1.5 Paper feeds between the ribbon and metal paper guide

9
Loading Paper
1. To load paper, first lift the cover plate.
2. Cut the end of the new paper roll into a point. (Figure 3.2.1)
3. Place the paper roll inside printer case. The cut end
of the paper must be underneath the roll. (Figure 3.2.2)
Slide the cut end of the paper between the two metal
plates inside the printer case.
4. Remove the ribbon cassette (see section 3.1 on page 6).
5. Switch the printer power on. The paper will partially feed into the printer.
If it does not, adjust the paper and reload it.
6. Push the SEL button to turn off the green “SEL” LED. Press the FEED button to
feed the paper the rest of the way through the paper feeder.
7. If the paper still does not fully feed into the printer, turn the gear attached to the
side of the paper feeder away from you (counter clockwise) to manually feed the
paper through the printer.
8. Carefully replace ribbon cassette. See section 3.1 on page 6.
NOTE: To print, the paper has to lay between the ribbon and the metal paper guide.
(Figure 3.2.3 on page 9). Carefully slide the end of the paper between the
ribbon and the metal paper guide. If the ribbon becomes twisted when you
load the paper, remove the paper and reload it.
9. Close the removable cover plate. Feed the end of the paper through the slot on
top of the cover plate.
Figure 3.3.1 Power supply connection
metal
paper guide ribbon paper
Figure 3.2.3 Paper feeds between the ribbon and metal paper guide
Figure 3.2.1
3.2
Power supply
This printer uses a 7.5 VDC, 1 A power supply. This power supply is also used to
charge the printer’s rechargeable battery pack. Insert the output plug of the power
supply into the jack on the back of the printer (Figure 3.3.1).
WARNING: Never connect AC mains directly!
If you use a power supply other than the power supply included with
the printer, pay attention to its voltage and current limits. If you exceed
the printer’s limits, the printer will not work normally, and the printer
head may be damaged.
How to charge rechargeable battery pack
Connect AC/DC adapter to printer and turn printer off. The rechargeable battery
pack needs to be charged for 12 hours to reach its full capacity. If you continue to
charge battery pack after it is fully charged, you will not damage or harm the battery
pack.
NOTE: Only use the included AC/DC adapter (7.5 V and 750 mA) for
electrical power.
Figure 3.2.2 Correct paper roll loading ( End of paper comes from underneath )
3.3
3.4
8

10 11
4. Setting up printer parameters
Selecting Meter Type and Communication Parameters
When shipped, the printer is set to print output from the OAKTON 200 series
pH hand-held meter. If you are using the OAKTON pH 2000 or pH 2500 benchtop
meter, or the CON 100 hand-held conductivity meter, follow steps 1-4 below.
Selecting Meter Type
1. Switch the printer off (ON/OFF switch is located on right side of printer).
2. Press down and hold the FEED key, then switch the printer on. Release the
FEED key after the printer head stops moving. The printer has now entered Select
Print mode. This mode lets you select the correct printer configuration for your
meter type (i.e. printer configuration for a hand-held meter or benchtop meter).
3. Use the SEL key to change the print mode. Each time you press the SEL key, the
printer scrolls to the next meter type. You can select from the following meter
types: HH pH meter, Benchtop pH meter, HH Cond meter, General.
NOTE: Use the General print mode for non-OAKTON instruments and to print the
pH benchtop meter calibration parameters (see page 12 for directions).
4. Press the FEED KEY to confirm the print mode and to move into baud rate
selection mode.
NOTE: Unless you have changed the communication parameter settings on your
OAKTON meter, you do not need to make further changes to the printer.
Turn printer off and then on again to begin printing. If you changed the set-
tings on your OAKTON meter, go to step 5 under “Selecting Communication
Parameters” on page 11.
4.1
Selecting Communication Parameters
The printer’s factory default communication parameter settings are 9600 baud,
8 data bits with one stop bit and even parity. This matches the default setting on the
OAKTON products and should not need to be changed.
IMPORTANT: For optimum performance, make sure your meter is set to 9600 baud,
even parity (2), and 2 stop bits, and that the printer is set to 9600 baud,
even parity (2), and 1 stop bit.
If you want to change the communication parameters, complete steps 1-4 on page 10
and then go to step 5 below:
5. Use the SEL key to change the baud rate to desired setting. Each time you press
the SEL key, the printer scrolls to the next baud rate. You can select from a baud
rate of 9600, 4800, 2400 or 1200.
6. Press the FEED key to confirm the baud rate and move into parity selection
mode.
7. Use the SEL key to change the parity setting. Each time you press the SEL key,
the printer scrolls to the next parity setting. You can select from Even, Odd, or
None parity settings.
8. Press the FEED key to confirm the parity setting and move into the data bit
selection mode.
9. Use the SEL key to change the data bit setting. Each time you press the SEL key,
the printer scrolls to the next data bit setting. You can select from 7 or 8 data bits.
10. Press the FEED key to confirm the data bit setting.
11. Once the you select the data bit, the stop bit is set automatically. If you selected
a data bit of 8, then stop bit will be 1. If you selected a data bit of 7, then stop bit
will be 1 or 2 depending on the parity. The printer then automatically moves into
auto line-feed mode.
12 After all desired settings have been made, turn printer off.
13. Turn printer on again for operation.
NOTE: After each selection has been made, always press FEED once to record the
selection before turning printer power off.

1312
9. Press the ▲key to select ON.
10. Press the PRINT button to print out the calibration parameters.
NOTE: If there are no previous calibration parameters stored in the meter, the ERR
indicator will flash.
To return to printing data with your benchtop meter:
1. Switch the printer off.
2. Press down and hold the FEED key, then switch the printer on. Release the
FEED key after the printer head stops moving. The printer has now entered Select
Print mode. This mode lets you select the correct printer configuration for your
meter type (i.e. printer configuration for a hand held meter or benchtop meter).
3. Use the SEL key to change the print mode to Benchtop pH meter.
Each time you press the SEL key, the printer scrolls to the next print mode in the
following order: HH pH meter, Benchtop pH meter, HH Cond meter, General.
4. After you scroll to the Benchtop pH meter print mode, press the FEED key to
confirm the Benchtop pH meter print mode setting.
5. Turn printer off and then back on again. You are now ready to print data from
your OAKTON pH benchtop meter.
How to perform the printer self-test
1. While holding down the SEL key, turn the printer power on.
2. Release the SEL key as soon as printer starts printing.
3. The printer will perform self test and print out current settings.
4. Press the SEL key again to stop self test.
5. Printing Data
Printing data
1. Switch the printer on (ON/OFF switch is located on right side of printer).
2. Make sure connecting cable is attached between printer and your
OAKTON meter, and that your OAKTON meter is on and taking
measurements.
3. Press the PRINT key on your OAKTON meter.
—If you have a benchtop meter, the printer will print a sequential sample
number, the meter reading, temperature, date and time at which the
reading was taken.
—If you have a portable (HH) meter, the printer will print a sequential
sample number, the meter reading and temperature.
Reset the sample number to one by turning the printer off and then on again.
Maximum sample number is 256.
NOTE: The OAKTON pH benchtop meters can print on timed intervals:
see your benchtop meter manual for information.
Printing OAKTON pH Benchtop Meter Calibration Parameters
If you are using your printer with an OAKTON pH benchtop meter and you
need to print out the calibration parameters, use the following procedure:
1. Switch the printer off (ON/OFF switch is located on right side of printer).
2. Press down and hold the FEED key, then switch the printer on. Release
the FEED key after the printer head stops moving. The printer has now
entered Select Print mode. This mode lets you select the correct printer
configuration for your meter type (i.e. printer configuration for a hand
held meter or benchtop meter).
3. Use the SEL key to change the print mode to General. Each time you
press the SEL key, the printer scrolls to the next print mode in the follow-
ing order: HH pH meter, Benchtop pH meter, HH Cond meter, General.
4. After you scroll to the General print mode, press the FEED key to confirm
the General print mode setting.
5. Turn printer off and then back on again.
NOTE: Make sure connecting cable is attached between printer and your
OAKTON pH benchtop meter.
6. Press the ON/OFF button to switch the OAKTON pH benchtop meter on.
7. Press the SETUP key to enter the Setup function.
8. Press the YES key repeatedly until you scroll to Setup parameter P4.0:
Print Meter Parameters.
5.3
5.2
5.1

14 15
7. Troubleshooting
Loading the Ribbon
Sometimes, although cassette is put in correctly, part of the ribbon rides up over the
printer head. This may be caused by two reasons:
1. The paper has caught on the ribbon. Remove paper and reload according to
section 3.2.
2. The ribbon has been used for long time. Replace with new ribbon cassette
according to section 3.1.
Printer will not run
1. Recharge the batteries for at least two hours. In the meantime, power printer with
the AC adapter.
2.. Replace AC adapter.
Printer characters are garbled
1. Make sure baud rate, parity and stop bit of meter and printer match.
8. Accessories
WD-35622-00 Printer, rechargeable, 110 VAC
WD-35622-05 Printer, rechargeable, 220 VAC
WD-35622-50 Replacement 110 VAC adapter for printer 35622-00
WD-35622-55 Replacement 220 VAC adapter for printer 35622-05
WD-35622-60 Replacement ribbon cartridge for 35622-series printers
WD-35622-62 Replacement paper roll for 35622-series printers
WD-35622-59 RS-232 cable, 25-pin to 9-pin
Wa
6. Specifications
Printer:
Print modes: HH pH meter, Benchtop pH meter, HH Cond meter, General
Baud Rate: 9600, 4800, 2400 or 1200 selectable
Parity: Even, Odd or None selectable
Data Bit: 7 or 8 selectable
Stop Bit: If you selected a data bit of 8, stop bit is 1. If you selected a data bit of 7,
stop bit is 1 or 2 depending on the parity.
Auto line-feed mode: Enable to automatically insert two line-feed characters after
each line of text printed.
Dimensions: 4"W x 3.625"H x 7.25"D (102 x 92 x 184 mm)
Weight: 2 lbs/0.9 kg
AC/DC Adapter:
Input: 110 VAC
Output: 7.5 VDC
Approval: UL for 110 VAC ; TUV for 220 VAC
Current: 750 mA maximum
Cord: 6 ft in length
RS-232 25-pin Female connector pin assignment
SB Printer 25-pin female 25-pin male
Pin # Pin #
2 TxD (send to computer) 3 RxD (receive from printer)
3 RxD (receive from computer) 2 (send to printer)
4 RTS ( busy) 5 CTS
7 GND (signal ground) 7 GND
20 DTR 6 DSR or connect 6 & 20 locally
SB Printer 25-pin female 9-pin male
Pin # Pin #
2 TxD (send to computer) 2 RxD (receive from printer)
3 RxD (receive from computer) 3 (send to printer)
4 RTS ( busy) 1 & 8 CTS
7 GND (signal ground) 5 GND
20 DTR 6 DSR or connect 6 & 4 locally