Page 23
Model TC80
3.1.4
A
LPHA
N
UMERIC
E
NTRY
The
LABEL
and
PASSWORD
(Caps and Numbers only) Menus allow alphanumeric entry. Entry is accomplished by
scrolling through the alphanumeric list with the
▲ (
forward) and
▼ (
backwards) arrows to the character of
choice and then moving to the NEXT digit. Pressing and holding the
▲
or
▼
keys will initiate two speed auto
scrolling. The character set is sequentially listed below. The first character in the set is an empty space.
! ” # $ % & ‘ ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ ¥ ] ^ _
‘ a b c d e f g h I j k l m n o p q r s t u v w x y z { | } → ←
3.2
MENU
STRUCTURE
Double tap any Selection/Adjustment key to enter the HOME Menu Screen. Five menu choices will appear,
CAL,
CONFIG, INFO, SIM and HOLD
. Each of the Menus is detailed below.
3.2.1
HOLD
(O
UTPUT
H
OLD
)
Pressing the
HOLD Key
activates the HOLD function, HOLD is ON, displayed.
Freezes the 4-20 mA output at the last value prior to activation
Freezes optional Alarm Relays in the current state
While in the HOLD mode the % Output display toggles between the last value and HOLD
Pressing HOLD again turns the hold function off, Hold is OFF, displayed. The HOLD function remains ON until it is
turned OFF. (See Time Out in CONFIG>XMTR>OUTPUT>HOLD)
3.2.2
CAL
(C
ALIBRATION
M
ENU
)
Four options are available,
AUTO, STAND, MANUAL and TEMP.
On dual channel
instruments choose Sensor 1 or Sensor 2 when prompted.
The first screen asks, “
Is this a New Sensor, YES / NO
”. If YES the calibration history from the previous sensor is
cleared from memory and a new register is started, if NO then the calibration is written to the memory stack, (3)
sets of data are stored.
AUTO
is a two point calibration. The calibration proceeds in two steps, Auto Cal 1 is an offset calibration
and Auto Cal 2 is a slope calibration. Auto Cal provides automatic solution
recognition of the calibration solutions used for each measurement in
accordance with the following list:
1.
pH Calibration Buffers (US Standard), pH 4.01, pH 7.00 and pH 10.00
(see
Appendix A
)
2.
Total Chlorine: Zero ppm (Sodium sulfite, Na
2
SO
3
in water), Chlorinated water, DPD Tested
Any two solutions can be used for AUTO calibration however if solutions other than those listed above
are used for calibration then the calibration values must be entered manually.
STAND
is standardization, a single point calibration. Standardizations are typically used to adjust the
process reading to agree with a laboratory determined “grab sample” reading.
MANUAL
is a data entry screen. Manual calibration allows the user to enter a
concentration with the corresponding mV value and a slope for an electrode.
Laboratory generated calibration data for an electrode can be input to a
remote analyzer where calibration is difficult or impractical.