Chemistry
Tosoh
GX format (fixed-width, HI-LEVEL STX/ETX/BCC) · RS-232

Connect Your Tosoh HLC-723GX to Any HIS or LIMS

The Tosoh HLC-723GX is an automated glycohemoglobin analyser for HbA1c. It is the first instrument in the LISBridge catalog that speaks neither HL7 nor ASTM E1394: its GX format is a fixed-width, delimiter-less ASCII record wrapped in the analyser's HI-LEVEL STX / ETX / BCC handshake, where field boundaries are character positions rather than separators.

Connect the HLC-723GX to your LIS without leaving A1c results to be read off a screen and retyped. LISBridge parses the GX record directly on the raw byte stream — necessary because the one-byte XOR block-check can itself be a printable character that ordinary control-byte cleaning would leave attached to the sample ID. It extracts the 12 components, total A1%, SA1c on the JDS, NGSP and Mono S scales, and SA1c (IFCC) in mmol/mol, and separates specimens from calibrators so a calibration run never reaches a patient record.

< 30 min
Setup time
GX format (fixed-width, HI-LEVEL STX/ETX/BCC)
Protocol
RS-232
Connection
>99.9%
Parse accuracy

How LISBridge Connects the Tosoh HLC-723GX

01

Connect your instrument

Plug in via RS-232 or point it at LISBridge over TCP/IP. Auto-detection identifies the instrument and loads the correct parser — no manual selection.

02

Parse the data

LISBridge reads the GX format (fixed-width, HI-LEVEL STX/ETX/BCC) stream in real time. Every result message is decoded — field by field — into structured data.

03

Validate results

Each result is checked for completeness. Duplicates caught. Malformed messages flagged. Only clean data moves forward.

04

HIS receives clean data

Validated results reach your HIS automatically — as HL7 or direct format. Stored locally too. No manual entry required.

Tosoh HLC-723GX — Frequently Asked Questions

What protocol does the Tosoh HLC-723GX use?

Neither HL7 nor ASTM. It sends the GX format described in the HLC-723GX Host Connection Specifications: a fixed-width, delimiter-less ASCII record inside the HI-LEVEL framing of STX, the record text, ETX and a one-byte XOR block-check, with ACK or NAK per record and EOT after the last record of a data set.

Which TRANS MODE should the analyser be set to?

Set TRANS MODE to GX FORM, which is the analyser's factory default. The G8, G9, G7 and GHbV transmission formats are deliberately not auto-routed: those records carry no identity token at all, so routing them by guesswork could attribute one analyser's result to another. In a clinical lab an explicit no is safer than a confident guess.

Which HbA1c values does LISBridge extract?

Total A1%, SA1c on the JDS, NGSP and Mono S scales, and SA1c (IFCC) in mmol/mol, alongside the 12 chromatogram components, the CALIB type and the flag judgment. The number of transmitted decimal places is read from the record rather than assumed.

Does LISBridge tell specimens and calibrators apart?

Yes. The specimen type field distinguishes a patient specimen from a calibrator, and LISBridge keeps calibrator runs out of the patient pipeline automatically.

Is the HLC-723GX order-capable?

No. LISBridge reads results from the HLC-723GX; it does not send test orders to it. The analyser's GX host connection is a result-reporting channel.

Does LISBridge support the HLC-723GX RP mode?

Yes, for labs already running it. GX FORM remains the factory default and the documented mode, and it is the one we recommend for new setups. RP mode (RP MODE = YES, the mode Tosoh reserves for its 501RP data-management program) is a second, fixed-length block format with STX, a type digit, payload, ETX and a checksum. It is not described in the Tosoh host specification, so LISBridge's parser was built from real captures with every analyte position cross-checked, and result columns that could not be identified are deliberately not emitted. Framed and unframed captures are both recovered by checking the block checksum.

How does LISBridge identify the specimen in RP mode?

RP mode sends no barcode. The specimen is identified by the sample number alone, and that sample number is used as the order ID. Check that the sample number on the analyser matches what your LIS expects. The G8, G9, G7 and GHbV formats are still not auto-routed, and RP mode is result-only like GX FORM.

Connect your Tosoh HLC-723GX today

Start your free 7-day trial — no credit card required. Full GX format (fixed-width, HI-LEVEL STX/ETX/BCC) support from day one.